scholarly journals Enhancement of oil flow in shale nanopores by manipulating friction and viscosity

2019 ◽  
Vol 21 (24) ◽  
pp. 12777-12786 ◽  
Author(s):  
Tuan A. Ho ◽  
Yifeng Wang
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil Flow ◽  
Supercritical Carbon

Enhanced oil recovery in shale nanopores using supercritical carbon dioxide and water.

Extraction and Characterization of fatty acids from the leaves and stems of Clinacanthus nutans using supercritical carbon dioxide and Soxhlet method

2021 ◽  
Vol 11 ◽  
Author(s):  
Sahena Ferdosh ◽  
Kamaruzzaman Yunus ◽  
Mohammad A. Rashid ◽  
Zaidul Islam Sarker
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Supercritical Carbon Dioxide ◽  
Oil Recovery ◽  
Saturated Fatty Acids ◽  
Biologically Active ◽  
Potential Source ◽  
Soxhlet Method ◽  
Clinacanthus Nutans ◽  
Supercritical Carbon

Background: The composition and bioactivity of natural plant extracts strongly depend on the extraction technique employed. Clinacanthus nutans Lindau (C. nutans) is a well-known medicinal plant in South-East Asia that has been traditionally used for the treatment of various diseases. Several conventional methods have been using for extraction of bioactive compounds from C. nutans. However, extraction of fatty acids using supercritical carbon dioxide was not reported yet from this medicinal herbs. Objective: The main objective of the study is to examine the potential of supercritical carbon dioxide (scCO2) extraction of fatty acids from leaves and stems of C. nutans. Method: Fatty acid compositions were determined from leaves and stems of C. nutans oil extracted by scCO2 (temperature 45-65 °C, pressure 25-35 MPa), and compared to the results of Soxhlet extraction. Results: Supercritical CO2 extraction shows the highest oil recovery in both leaves (3.7%) and stems (1.6%) at pressure 35 MPa, temperature 65 °C and 2 ml/min flow rate, which was closer to the yield of Soxhlet. The scCO2 yields presented a higher percentage of polyunsaturated fatty acids (PUFA), especially linoleic acid (C18:2n-6). Palmitic acid ranging from 42%- 47% in leaves and stems of C. nutans was found dominant saturated fatty acids (SFA) in both scCO2 and Soxhlet method. Conclusion: The current results indicate that leaves and stems of C. nutans could be a potential source of fatty acids especially biologically active compounds.Conclusion: The current results indicate that leaves and stems of C. nutans could be a potential source of fatty acids especially biologically active compounds.

scholarly journals Optimisation of oil extraction from quinoa seeds with supercritical carbon dioxide with co-solvents

2018 ◽  
Vol 36 (No. 1) ◽  
pp. 81-87 ◽  
Author(s):  
Grażyna Wejnerowska ◽  
Anna Ciaciuch
Keyword(s):  
Carbon Dioxide ◽  
Particle Size ◽  
Supercritical Carbon Dioxide ◽  
Oil Recovery ◽  
Extraction Method ◽  
Oil Extraction ◽  
Carbon Dioxide Extraction ◽  
Temperature Time ◽  
Total Extraction ◽  
Supercritical Carbon

In the present work supercritical fluid extraction with carbon dioxide was performed to obtain oil from quinoa seeds. The effects of extraction variables – namely pressure, temperature, time, particle size, and co-solvent, on supercritical carbon dioxide extraction are investigated. Total extraction yields and compositions using pure CO<sub>2</sub> and CO<sub>2</sub> + selected co-solvents are compared. The maximum recovery for quinoa oil is found to be about 89%, and is obtained when extractions are carried out at 25 MPa, 40°C for 80 minutes. A significant effect on the oil recovery is exerted by size reduction of seeds to a particle size ≤ 0.50 mm and addition of co-solvent to seed in an amount of 20% – methanol/ethanol (1 : 1, w/w). Irrespective of the extraction method and conditions, the fatty acid composition is not substantially changed.

scholarly journals A Feasible Experimental Evaluation of Surfactant Polymer Coupled with Direct Foam Flooding on the Oil Recovery Factor

2018 ◽  
Author(s):  
Afshin Davarpanah
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Oil Recovery ◽  
Experimental Evaluation ◽  
Recovery Factor ◽  
Foaming Agent ◽  
Recovery Techniques ◽  
Water Cut ◽  
Foam Flooding ◽  
Supercritical Carbon

Optimum selectivity of enhanced oil recovery techniques would play a substantial role in the economic prosperity of petroleum industries which might be virtually eliminated unnecessary expenditures. In this paper, the simultaneous utilization of foaming agent, surfactant polymer (SP), and supercritical carbon dioxide were taken into the investigation under the miscible condition to evaluate the efficiency of each scenario on the cumulative recovery factor, water cut and pressure drop. According to the results of this experimental evaluation, SP-foam flooding had witnessed the highest blockage which is caused to have the maximum recovery factor due to the mobilization of more oil volume in the low permeable pores and cracks. Furthermore, the utilization of surfactant with supercritical carbon dioxide had experienced the least recovery factor regarding the insufficient foam generation which is led to less mobilization of oil phase in the pore throats.&nbsp;&nbsp;&nbsp;

scholarly journals Erratum to: Experimental investigation of immiscible supercritical carbon dioxide foam rheology for improved oil recovery

2017 ◽  
Vol 28 (6) ◽  
pp. 1192-1192
Author(s):  
Shehzad Ahmed ◽  
Khaled Abdalla Elraies ◽  
Jalal Foroozesh ◽  
Siti Rohaida Bt Mohd Shafian ◽  
Muhammad Rehan Hashmet ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Experimental Investigation ◽  
Supercritical Carbon Dioxide ◽  
Oil Recovery ◽  
Improved Oil Recovery ◽  
Foam Rheology ◽  
Supercritical Carbon

scholarly journals Estimation of efficiency of oil extraction with supercritical CO2 in a low-permeability reservoir

2021 ◽  
pp. 210-220
Author(s):  
A. I. Shayakhmetov ◽  
◽  
V. L. Malyshev ◽  
E. F. Moiseeva ◽  
A. I. Ponomarev ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Oil Recovery ◽  
Western Siberia ◽  
Oil Extraction ◽  
Core Model ◽  
Low Permeability ◽  
Low Permeability Reservoir ◽  
Object Of Study ◽  
Supercritical Carbon

The results of experimental study of oil extraction by supercritical carbon dioxide in a low-permeability reservoir are presented. As an object of study, we selected core samples from a low-permeability oil-saturated reservoir of one of the fields in Western Siberia, which is currently being developed in the regime of depletion of reservoir energy. The contact time of supercritical carbon dioxide with composite core models in three experiments was 8, 24, and 72 hours, respectively. Based on the results of laboratory experiments, the dynamics of the penetration of carbon dioxide along the depth of the composite core model was established. The value of the oil recovery factor and it’s distribution along the length of the core model in time is given. Keywords: carbon dioxide; low-permeability reservoir; mnimum miscibility pressure; slim-tube; extraction; oil recovery.

scholarly journals Supercritical Carbon Dioxide Extraction of Hevea Brasiliensis Seeds: Influence of Particle Size on to Oil Seed Recovery and its Kinetic

2021 ◽  
Vol 17 (3) ◽  
pp. 253-261
Author(s):  
Lee Nian Yian ◽  
Nicky Rahmana Putra ◽  
Zuhaili Idham ◽  
Nor Faadila Mohd Idrus ◽  
Ahmad Hazim Abdul Aziz ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Particle Size ◽  
Supercritical Carbon Dioxide ◽  
Oil Recovery ◽  
Average Particle Size ◽  
Morphological Characterization ◽  
Extraction Rate ◽  
Average Particle ◽  
Diffusivity Coefficient ◽  
Supercritical Carbon

The aim of this study is to investigate the effect of particle sizes on yield, diffusivity, mass transfer and morphological characterization on extraction rate of rubber seed oil recovery by supercritical carbon dioxide (ScCO2). Pressure 30 MPa, temperature 60 oC and average particle size 500 µm gives the maximum oil recovery (34.71%), diffusivity coefficient (5.13 E-12 m2/s) and extraction rate (0.6 mg/sec). The morphological characterization of extracted rubber seeds was done on the basis of scanning electron microscopy which was parallel with the results of the effect of particle size. The results obtained from gas chromatography-mass spectrometry showed that the rubber seeds oil contained significant essential fatty acids and certain chemical constituents which are very valuable.

Experimental investigation of immiscible supercritical carbon dioxide foam rheology for improved oil recovery

2017 ◽  
Vol 28 (5) ◽  
pp. 835-841 ◽  
Author(s):  
Shehzad Ahmed ◽  
Khaled Abdalla Elraies ◽  
Jalal Forooozesh ◽  
Siti Rohaida Bt Mohd Shafian ◽  
Muhammad Rehan Hashmet ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Experimental Investigation ◽  
Supercritical Carbon Dioxide ◽  
Oil Recovery ◽  
Improved Oil Recovery ◽  
Foam Rheology ◽  
Supercritical Carbon
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